In the past I have worked up the OAL for a rifle cartridge by barely seating the bullet in the case and repeatedly trying to chamber it until the bolt will close easily. I have also polished the bullet with steel wool and chambered it till I could see the rifling marks on the bullet and then backed off whatever distance I wanted. What methods do you guys use to determine or measure at what point your bullet contacts the rifling or how far off the rifling you seat your bullets?

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War Eagle!!!